Dust-collecting machine.



J. C. LUDEN.

DQST COLLECTING MACHINE. APPLICATION HLED MAR.18, 19(15.

Patented Nov. 16, 1915.

ATTORN EY JACOB C. LUDEN, F READING, PENNSYLVANIA.

DUST-COLLECTING TEACHINE.

Specification of Letters Patent. Pat-,@MQNW, 1&5, 1915 Application led March I8, 1915. Serial No. 15,171.

To all whom t may concern.'

Be it known th t I, JACOB C. LUDEN, a citizen of the United States, residing at Reading, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Dust-Collecting Machines, of which the following is a specilication. j

This invention relates to improvements in dust collecting machines and it applies more particularly to that character of 4machine used by jewelers and others in polishing precious metals and in which it is desirable to save the particles ot metal that would otherwise be carried away and lost, during the process of polishing.

The invention consists of a suction fan contained within a casing, a dust conveying means leading from the polishing wheel to the fan, and a plurality of traps between the point at which the object is polished and the point of exit for the air from the machine.A

A further object is to provide an adjustable hood' for the polishing wheel to accommodate wheels of different sizes, and of means for moving the dust collecting mechanism out of proximity with the polishing wheel when it is not desired to trap the dust.

The invention is more fully described in the following specification and clearly illustrated in the accompanying drawing, in which:-

Figure 1 is a front, elevational view, with portions of the casing cut away tor the purpose of illustration. F ig. 2 is a side elevational view.

In the drawing The numeral 1 designates the base plate; 2 the body or casmg of the machine and 3 a support for a suitable motor, which latter is designated by the numeral 4.

Within the casing, at its upper extremity, I place a fan 5, provided with a shaft 6 to which rotary movement is transmitted from the motor through the medium of a belt 7. The motor shaft 8 is adapted to carry a polishing wheel, indicated in dotted lines, 9. Partially'inclosing the wheel 9 is an adjustable hood 10 formed of a plurality of sections, each of which is attached to its adjoining member by means of a journaled rod 12 and each rod is provided with a thumb nut 13, for securing the parts when they have been adjusted to position, determined by the diameter of the polishing wheel 9. This 'the side of hood includes in its construction, in addition to the adjustable sections, a head piece 15 to which the sections are attached, and this head piece is hollow and has depending therefrom, a hollow tube 16 at the lower extremity of which I .attach a removable dust trap 17, in the form of a globular body. Immediately above this globular trap, I form a side outlet in the tube, 18, in the form of a sleeve and this sleeve enters an opening in the casing and is provided with a thumb screw 2 0. The tube, carrying the hood, may thus be moved around this sleeve connection and secured in the position desired by means of the thumb screw 20, as for instance when it is desired to use the4 machine without catching the dust, or when an unusually large article is to be polished. rI`he posltion assumed by the tube when thus swung out ot proximity with the polishing vlieel2 is'indicated by a dotted line X in The casing of the machine is divided into two compartments, serving in turn as supplemental traps after the dust has passed the globular trap above described. The central portion of the casing, into which the sleeve 18 enters, comprises one compartment 22, whlch has an outlet 23 at its upper extremity and this outlet leads into a communication 24 on the outside of the casing, whose upper end in turn leads, through an inlet 25 into the upper portion of the casing in which the fan 5 is located. The central compartment 22 does not extend the full 'depth of the casing,but a passageway 27, formed by a vertical wall 28 serves as a communication between the upper and lower extremities of the casing, thus forming a third compartment, the lower portion of which is provided with two outlets 30 at opposite sides of the casing and through which the air escapes after it has been drawn through the machine. Surrounding the lower extremity of the casing, and covering the said air outlets, I place a strainer 33, securely attached to the casing at top and bottom, so that while the air may escape therethrough,any dust particles that may reach this point will be retained in the lower compartment.

It will thus be seen that one compartment or dust trap is located approximately at the middle or central portion of the casing, while the other compartment includes that portion of the casing at the upper end which tion ofthe fan into the machine.

is occupied by the fan,'the vertical passageway 27, and the lower end of the casing which is provided with air outlets and screen.

At the side of the casing, leading from the passageway 27, I form an outlet, provided with a suitablevalve to which a tube or other communicating member may be attached, indicated by numeral 36.

When the machine is inuse and an article is being polished, the motor -which drives the polishing wheels also Vdrives the suction `fan, and all dust particles are drawn by the flak- 1:-

e heavier particles will be trapped and retained in-the removable globular trap 17 from which they may be removed at will. The dust and air is then carried into the casing compartment 22 'and any heavy particles that are not drawn therethrough by the air will deposit on the bottom thereof (see D in Fig. l) from which it may be later removed through the door 37. The air passing out of this compartment 22 at the top, will enter the passageway or communication 24 located on the side of the casing, and whose upper end opens into the upper end of the third compartment Yand is forced by the action of the fan, down the passageway 27 to the lower portion of this compartment where any residue that may still remain in the air is deposited, and the air will pass out through the openings in the casing vand be strained as it passes through the.

strainer 33.

If the exhaust from the machine should be required for any purpose, the side outlet with its valve will be utilized. This outlet,

.controlled by a valve 35, is provided with a closure plate located inside the casing and adapted to close the opening leading to said valve, and this plate is provided with a thumb piece by means of which the closure plate may be operated. It will thus be seen,

that when the air after. leaving the fan is to be used as a blast,l the plate 40 will cut off the air in its passage to the strainer and vdeflectit into the outlet 35.

Having thus described mv invention, I claim 1. In a machine of the character described, a suction fan, a housing therefor, a passageway leading to said housing, a dust chamber communicating with said passageway, a tubular member communicating with said chamber, a. hood 'at the entrance end of the tubular member, and a globular trap removably located in the tubular member between the hood and thedust chamber.

2. In aI dust collecting machine, a casing comprising two compartments, one of which partially surrounds the other, a communication between said compartments, a suction fan located in one of said compartments, and an air and dust inlet into the other compartment, a communication leading to said inlet, a removable dust trap located in said communication, a hood at the entrance of said communication, means for setting said communication at an angle to the vertical line of the casing, an air outlet at the bottom of the casing and a strainer covering said outlet.

3. In a dust collecting machine, a casmg having a plurality of compartments therein, an inlet and an outlet to and from the casing, a tubeattached to the inlet, a dust trap in the tube, a hood at the entrance of the tube, means for swinging said tube out of vertical alinement, a strainer for the air outlet of the casing, a supplemental outlet for the air from said casing and means for diverting the air into said supplemental outlet, and a valve for controlling the passage of air through said supplemental outlet.

In testimony whereof I affix my signature.

JACOB C. LUDEN. 

